List-I (Types of adaptation) | List-II (Examples) | ||
1 | Biochemical adaptation | p | Desert lizards |
2 | Behavioural adaptation | q | Deep sea fishes |
3 | Physiological adaptation | r | Opuntia |
4 | Morphological adaptation | s | Kangaroo rats |
Adaptations enable organisms to thrive in diverse environmental conditions.
Matching adaptations with examples:
1. Biochemical adaptation - q. Deep sea fishes: Produce antifreeze proteins to survive cold depths.
2. Behavioral adaptation - p. Desert lizards: Bask in sun to regulate body temperature.
3. Physiological adaptation - s. Kangaroo rats: Concentrated urine minimizes water loss.
4. Morphological adaptation - r. Opuntia: Spines (modified leaves) reduce water loss.
The correct matching is: (C) 1-q, 2-p, 3-s, 4-r
Other options are incorrect because: - (A) Mismatches behavioral and morphological adaptations - (B) Incorrectly links all adaptation types - (D) Reverses physiological and biochemical examples
Biochemical adaptation: This involves changes at the molecular level, such as enzyme adaptations in organisms to survive extreme conditions. For example, desert lizards have enzymes suited to high temperatures.
1 - q (Deep sea fishes).
Behavioral adaptation: Changes in the behavior of organisms to survive in their environment, such as migration patterns or nocturnal activity.
2 - p (Desert lizards).
Physiological adaptation: Changes in an organism’s internal processes, such as cacti storing water.
3 - r (Opuntia).
Morphological adaptation: Physical changes in the structure of an organism to help it survive, such as kangaroo rats evolving to conserve water in deserts.
4 - s (Kangaroo rats).
Thus, the correct matching is 1 - q, 2 - p, 3 - r, 4 - s, which corresponds to Option (C).
The given graph shows the range of variation among population members, for a trait determined by multiple genes. If this population is subjected to disruptive selection for several generations, which of the following distributions is most likely to result?
Read the following passage and answer the questions that follow. According to evolutionary theory, every evolutionary change involves the substitution of a new gene for the old one and the new allele arises from the old one. Continuous accumulation of changes in the DNA coding for proteins leads to evolutionary differences. The chemical composition of DNA is basically the same in all living beings, except for differences in the sequence of nitrogenous bases. Given below are percentage relative similarities between human DNA and DNA of other vertebrates:
(a) What is the term used for the substitution of a new gene for the old one and the new allele arising from the old one during evolutionary process?
(b) Which one of the following holds true for the data provided in the above table?
(c) [(i)] To which category of evolution (divergent or convergent) does the following relationship belong? Justify your answer.
Human and Rhesus Monkey
OR
[(ii)] Differentiate between Convergent and Divergent evolution.